1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9692d425d655292a3d4cbb6542e2acb251a54b7ae1e0a89729b631f3146294c6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce52d63c-f548-412a-a173-6dc69a70b6ec.json and https://artists.proofprofile.net/proofs/artist/ce52d63c-f548-412a-a173-6dc69a70b6ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e718bf796df02e6916d3d19d85cf9b070f5ad28d81ef2fc5bad428dbbdce7bd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22323185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c6e339001d275f207a03e3411a71d35105ebf304a831a0e53502667d24b2e0. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22323186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9a802f9f81fd2e113665df0a47411bc4f32bdb9a3bffbb2d47af4b2e7cec0f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22323187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0c16f4dd3502dadb03f6fcf5f0cb18b7ced9238b8ef386bc48ec1074819f49. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22323188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67c2377a80f8aeaff6905503d06ed8cd4277bb263a35078c14221eb61dd913. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22323189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfd8800cf1aa97e884254254decd2f01a99e85021d835f6d236aa3ada5e1f40. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22323190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cc42f34f7f17214c3e10218607e4887406c061fd5334cc8540ec9749b35742. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22323191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed4bea87a57d17f59cd0c118cc7fb431729fa4657508ae1a17ecb6c9f68e9a7. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22323192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7eedeeb43604c4f964d44e857560b936650936de53b82c5c337ae39ff25ddb. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22323193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c1ad3fe5c58cb261400c703f31f8798a2a11a28472b36fab5950bda7bea796. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKXN22396187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18cb120d021ef27b439ed1a6e09d1f38e34341024da5f8e28cd46efb7637b46. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKXN22396188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186bc00116ccb5f64875fda70da5391fdafc29e4cf2d08822fec1e1b0b721f80. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKXN22396191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52ace0fdc02288d33ea0e648569673af44d7ac68a44469085a4b188123e240e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKXN22396192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cb64fba0cd8450bb2310c58fbe64cda8eae7be559aa7129f82ddde924c0bea. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLFP2501283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34911d27908ab06d263b8369628fdfaf40257da0ad84ec1169b6ef67f1b53d93. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXHUT2589496.